The father and son duo explore a section of Hadrian's Wall, visit a family run smokehouse to discover how kippers are prepared, stay in a haunted castle and learn about a dog breed.
The pair load their bikes onto the Paddington-Penzance sleeper train, take a ferry across the Celtic sea and head to the Isles of Scilly where they help deliver the mail and witness the World Gig Rowing Championships.
The Lambs challenge each other to a race through Britain's first National Park, join the World Hen Racing Championships, witness an ancient ceremony and indulge in some springtime sheep-washing.
The Lambs spot seals around Stangford Lough, enjoy Guinness and oysters, research their family history and play the bodhran at Northern Ireland's oldest thatched roofed pub.
The Lambs tackle the Hebridean Cycle Way, meet a weaver of Harris Tweed, have a kick-about on one of the world's most spectacular football pitches and learn to play the bagpipes.
